Improved draw-bar



' w. KOTZUM.

Car- Bumper Spring.

Patented June 29 Q Q o n. PETER$ nub-ma n m. Wauhingkm. no

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Letters Patent No. 92,062, dated June 29, 1869.

- IMPROVED DRAW-BAR.

The Schedule referred to in these Letters Patent and making part of thesame.

T 0 all whom it may concern Be it known that I, WENZEL KOTZUM, ofAurora,

2 in the county of Dearborn, and in the State of Indiana, have inventeda certain new and useful Improved Draw-Bar Spring for Railroad-Oars; anddo hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon.

The nature of my invention consists 'in the construction and generalarrangement of a draw-bar spring for railroad-cars, made of a series ofleafsprings, connected in a manner that'willbe hereinafter set forth.

In order to enable others skilled in the art to which my inventionappertuins, to make and use the same, 1 will now proceed to describcitsconstruction -and operation, referring to the annexed drawings, whichform a part of this specification, and in which- Figure 1 is ahorizontal section of the draw-bar and spring; and

Figure 2 is a perspective of the draw-bar.

A represents that portion of a railrozul-car to which the draw-bargenerally is attached, said portion being cut open, or ;slotted in thecentre, as seen in fig. 1, forming two jaws, B B. These jaws are slottedon their inner sides for a suitable distance, and in these slots theends of two movable cross-bars, C O, are inserted.

Between the cross-bars C G is placed a series ofleaf-springs, a a, whichare held in proper position by a fiat bolt, 1), passing through thecentre of said springs, and through the centre of the cross-bars O 0,thus holding the springs in place, but at the same time allowing them toact freely.

The ends of the cross-bars O O are bent inward 1n the slots on the sidesof the jaws B B, so that the said cross-bars cannot be drawn closetogether, but will, under all circumstances, leave room enough betweenthem for the springs a, a.

The draw-bar D, whiohembraces the cross-bars G O and springs a a, isprovided with shoulders, e e, as seen in fig. 2, which rest on theouterside of the front cross-bar, while the centre of the draw-bar restsagainst the rear side of the inner cross-bar, the bolt b passing throughthis portion of the draw-bar.

It will thus be seen that my draw-bar spring is double-acting. Forinstance, when the bumpers are brought suddenly together, the shoulderse e of the draw-bar press the outer cross-bar inward; and when the carsare put in motion, the inner cross-bar is drawn outward, or forward, theleaf-springs a a, in both instances, yielding suflicient to relieve thecars from the sudden jar and concussion.

Having thus fully described my invention,

What I claim as new, and desire to secure by Letters Patent, is- I Thecombination of the draw-bar B, having shoulders e e, the cross-bars O O,springs a a, and flat bolt 1), all constructed and arrangedsubstantially as and for the purposes herein set forth.

In testimony that I claim the foregoing, I have hereunto set my hand,this 18th day of February, 1869.-

Witnesses:' WENZEL KOTZUM.

Mronsnn SIEMANTEL, ADAM HERDEGEN.

